NATE Gas Heating (Air) Service Prep Exam Study Guide Questions with
Correct Answers | Latest Update | Guaranteed Pass
ACCA Manual J - CORRECT ANSWER -Manual for accurate residential load calculations
A.F.U.E. - CORRECT ANSWER -Annual Fuel Utilization Efficiency
Dampers - CORRECT ANSWER -Control supply airflow to each zone
Separate and independent systems - CORRECT ANSWER -Condition air in each zone
Thermostat - CORRECT ANSWER -Set to medium high blower speed for air balancing check
Electromechanical thermostat - CORRECT ANSWER -Similar to electronic programmable
thermostat
Mercury bulb thermostat - CORRECT ANSWER -Critical for proper operation
Manometer - CORRECT ANSWER -Measures pressure in inches of water
Differential pressure gauge - CORRECT ANSWER -Measures duct static pressure
Supply side pressure loss - CORRECT ANSWER -0.15 IWC
Return side pressure loss - CORRECT ANSWER -0.55 IWC
Total effective length of supply ductwork - CORRECT ANSWER -380 feet
, Total effective length of return ductwork - CORRECT ANSWER -325 feet
Air balancing report - CORRECT ANSWER -Includes total pressure, static pressure, and outlet
pressure
Design air velocity - CORRECT ANSWER -700 to 900 FPM in main supply trunk
Dampers - CORRECT ANSWER -Open completely in all rooms
Economizers or fresh air supplies - CORRECT ANSWER -Never near a sewage vent
Motorized economizer - CORRECT ANSWER -Check that vanes operate without binding
Infiltration - CORRECT ANSWER -Leakage of air into a conditioned space
Electronic air cleaners - CORRECT ANSWER -Sized based on CFM of return side
Electronic control - CORRECT ANSWER -Check on board transformer voltages and output
voltages
Category 1 vented appliance - CORRECT ANSWER -Vent height from flue collar to top of vent
Vertical combustion air intake - CORRECT ANSWER -Height limitation set by manufacturer
Combustion air from non-direct, condensing gas furnace - CORRECT ANSWER -Acceptable in any
interior unconfined space
Correct Answers | Latest Update | Guaranteed Pass
ACCA Manual J - CORRECT ANSWER -Manual for accurate residential load calculations
A.F.U.E. - CORRECT ANSWER -Annual Fuel Utilization Efficiency
Dampers - CORRECT ANSWER -Control supply airflow to each zone
Separate and independent systems - CORRECT ANSWER -Condition air in each zone
Thermostat - CORRECT ANSWER -Set to medium high blower speed for air balancing check
Electromechanical thermostat - CORRECT ANSWER -Similar to electronic programmable
thermostat
Mercury bulb thermostat - CORRECT ANSWER -Critical for proper operation
Manometer - CORRECT ANSWER -Measures pressure in inches of water
Differential pressure gauge - CORRECT ANSWER -Measures duct static pressure
Supply side pressure loss - CORRECT ANSWER -0.15 IWC
Return side pressure loss - CORRECT ANSWER -0.55 IWC
Total effective length of supply ductwork - CORRECT ANSWER -380 feet
, Total effective length of return ductwork - CORRECT ANSWER -325 feet
Air balancing report - CORRECT ANSWER -Includes total pressure, static pressure, and outlet
pressure
Design air velocity - CORRECT ANSWER -700 to 900 FPM in main supply trunk
Dampers - CORRECT ANSWER -Open completely in all rooms
Economizers or fresh air supplies - CORRECT ANSWER -Never near a sewage vent
Motorized economizer - CORRECT ANSWER -Check that vanes operate without binding
Infiltration - CORRECT ANSWER -Leakage of air into a conditioned space
Electronic air cleaners - CORRECT ANSWER -Sized based on CFM of return side
Electronic control - CORRECT ANSWER -Check on board transformer voltages and output
voltages
Category 1 vented appliance - CORRECT ANSWER -Vent height from flue collar to top of vent
Vertical combustion air intake - CORRECT ANSWER -Height limitation set by manufacturer
Combustion air from non-direct, condensing gas furnace - CORRECT ANSWER -Acceptable in any
interior unconfined space
